The Library Hotel, 299 Madison Ave., New York, N.Y. LibraryHotel.com. Decorations are different in all 60 rooms of the Library Hotel, which separates its floors by topics based on the Dewey Decimal System.

The Library Hotel, 299 Madison Ave., New York, N.Y. LibraryHotel.com. Decorations are different in all 60 rooms of the Library Hotel, which separates its floors by topics based on the Dewey Decimal System. (Enrique Burgos)